Question

+5x -3=0 ?
+4-2x=0 ?
8x -5 = -1 ?

Answer 1

+5x -3=0 
5x=3
x= 3/5

+4-2x=0
-2x=-4   multiplica tudo por -1 para o x ficar positivo
x=4/2    
x=2
 
8x -5 = -1 
8x=-1+5
8x=4
x=4/8
x=1/2

Answer 2

5x-3 = 0
5x = 0 + 3
5x = 3
x = 3 / 5 = 0,6

4 - 2x = 0
-2x = 0 - 4
-2x = -4
x = -4 / -2
x = 2

8x - 5 = -1
8x = -1 + 5
8x = 4
x = 4 / 8 = 1 / 2 = 0,5